Automatic governor



May 27, 1930. c. cooK AUTOMATIC GOVERNOR Filed March 1 6, 1929 'INVENTOR. 594w foam j ATTENEYSZ.

- Patented May 27, 1930 UNITEDBTATES PA ENT OFFICE CALVIN COOK, OF ANDERSON, INDIANA,- ASS IGNOR 'IO PIERCE GOVERNOR COMPANY,

01 ANDERSON, INDIANA, A CORPORATION v 7 AUTOMATIC 4 Application filed March 16,

This invention relates to an automatic governor which will maintain a predetermined I pngline speed substantially independent of The chief object of the invention is to provide a governor which will be automatically operable'by the engine as by the suction thereof so that substantially predetermined engine speed can be maintained substantially v independent of the load applied to the engine, and particularly without any surging at the critical speed such as occurs in present day automatic governors.

In other words the chief feature of the inventionconsists in arranging the governor such that it is-extremely sensitive at the critical speed so that wide fluctuations above and below the same arenotnecessary, nor reqgired, in order to operate the governor to ain a substantially constant engine speed.

This invention is an improvement upon and simplification of. a similar invention by Carl C. Essex, Serial Number 275,387, filed May 5, 1928.

The simplification in the present invention consists in simplifying the leverage arrangement associated with the throttle .valve and a second improvement consists in providing the throttle valve with acombination counter weight and air engageable blade or air pock--' eting construction.

The full nature ofthe invention will be more fully understood from the accompanying drawings and the following description and claims: In the drawings Fig. 1 is a top plan viewof the leverage mechanism with cover removed and parts broken away to show other parts in section and in detail. Fig. 2 is a view similar to Fig. 1 but shows the parts in a second and excessive speed prohibiting position. Fig. 3 is a side elevation of the entire governor mechanism including a portion of the engine intake and parts are brokenaway to show other parts in section and in detail.

' Fig. 4 is a similar view of the same parts showing the same in the position corresponding to the excessive speed prohibiting position shown in 2. Fig. 5 is a transverse such that when the force becomes operative 25, said eovnnnon 1929. Serial mi. 347,542.

ly of the intake opening 11 and through the same but not diametrically thereof is a shaft 14. Said shaft 14 supports an elliptical butterfly. valve 15. Interposed between said shaft which is cut away as at 17 is a deflecting vane construction 18 having an edge 19 which is included in a plane including the longitudinal axis of the shaft 14. This spacer construction 17 positions the valve 15 when lying longitudially of the intake such that the plane thereof is coincident with the longitudinal axis of the intake, see Fig. 4.

When the speed of the engine increases the suction likewise increases and the movement of the butterfly valve is opposed by suitable spring mechanism operating through the linkage, the saine being set forth hereinafter.

The vane construction 1819 is arranged in opposition to the s ring for movement, the movement of the utterfly toward the closing position quickly takes place and is maintained in that position until the excessive' speed registered through the suction of the intake diminishes, whereupon the springs quickly return the mechanism to the central or balanced position as shown in Fig. 4, or to an intermediate position.

The adaptor insert 10 is connected by a shaft housing 20 to a mechanism-housing 21 and herein the three are formed integral although the parts may beseparated for universal adaptability as set forth inthe Essex application before-mentioned. The'shaft-14 extends through housing 20 and into the hous- 9c ing 21. Mounted upon the free end thereof is a lever 22having an intermediate oflset portion 23. Thelever at its other end supports a pin 24 which pin is also supported by a link in being positioned substantially mid-way etween the ends thereof. Herein pin 24 is rigid with link 25 and isrotatably supported in the end of the link 22. l

' One end of link 25 includes an elongatedslot 26 and said elongated slot receives a pin 1- 27 which is reduced to form a shoulder, not shown and upon which said link not only slides but may rotate as well. A washer 28 above the link and a cotter key 29- retain the link in pin and slot connection.

' The opposite end of link 25 mounts a pin 30 and a plunger 31 is pivotally supported thereby. Plunger 31 supports a stem 32 which has its free end slidably supported in the bore or opening 33 formed in an externally threaded guide member 34. A plate 35 has a threaded engagement as at 36 with said guide. The guide 34 at its opposite end is rotatably mounted in a boss extension 37 of the housing 21 and is exposed through the opening 38 formed therein. The end of said guide 34 is suitably fashioned for tool engagement as at 39. Said guide is rotatably mountedin said opening 38 and is prevented from longitudinal movement therein by 'a screw 40 that rides in an annular slot 41 formed in the guide, said screw being supported by the housing and being externally exposed for assembly.

A suitable cover cap 42 is adapted to inclose the mechanism and may be suitably connected to the housing and may be sealed. To obtain such a connection complementary ears may be formed upon the cap 42 and housing 21 and the usual seal associated with both ears.

Interposed between plunger 31 and the guide 34 and concentric with the same and the stem 32 is a coil spring 43 the tension of which is adjusted by moving the plate 35 towards and away from the plunger 31. The spring 43 normally tends to project the plungor 31 from the positionshown in Fig. 1 toward the position shown in Fig. 2, Fig. 2 showing the normal or neutral position.

A tension spring 44 is stationaril mounted at 45 and herein is shown connecte atits opposite end to the pin 24. This spring opposes undue compression of spring 43 but its primary function is to return the parts to the neutral position.

As the speed of the engine increases, suction increasingly pulls upon the butterfly valve and tends to close it, since it is eccentrically positioned. This closing movement is opposed by coil spring 43 which prevents additional movement be 0nd the adjusted tension. The tension spring 44 also opposes this movement. Both springs tend to return the mechanism to neutral osition permitting the en 'ne to proceed un er no control. 4

he invention claimed is:

- 1. In an automatic-governor the combination of an engine res onsive speed controlling oscillatable mem er, a lever rigid with said oscillatable member, another lever having an elon ated elliptical slot mountin at one end an pivotally connected to the %rst mentioned lever intermediate its ends, and a suction opposing extended spring construction connected to the opposite end and com-- pressible by the suction operation. I

2. In an automatic governor the combination of anengine responsive speed controllin oscillatable member, a lever rigid with sai oscillatable member, another lever having an elongated elliptical slot mounting at one end and pivotally connected to the first mentioned lever intermediate its ends, a suction opposing spring construction connected tothe opposite end, and a return spring directly connected to the levers forpositively returning the same to neutral or non-controlling position and extensible in the suctlon operation.

3. A device as defined by claim 1 charac-' terized by the spring construction *compri'sing a relatively stationary but adjustable spring seat, a plunger, 0. stemslidably'connecting the same, and a coiled spring concentric with the stem and interposed between said seat and plunger.

4. A device as defined by claim 2 characterized by the spring construction comprising a relatively stationary but adjustable spring seat, a plunger, a stem slidably connecting the same, and a coiled s ring concentric with the stem and interpose between said seat and plunger.

5. In an intake for an internal combustion fixed my signature.

' CALVIN COOK. 

